Twenty-fifth century. Russian half of Mars. The Church hires a young detective from another hemisphere to investigate a series of mysterious murders: one after another, people are dying in line for an appointment with the miraculous healer Clementine of Sidon. To help the detective, they give a young nun who has lost her memory and is forced to constantly take medication so as not to die from an incurable disease. First of all, the partner asks to get her a military-style sewing machine... Together they will have to plunge into the ominous secrets of the past, fight their own nightmares and find out who is hiding behind the masked faces, why Mars is no longer at war and what really happened a hundred years ago on orbital hospital ship "Kosmodamiansk", where the star of the holy virgin martyr Clementine of Sidon first rose.